SB2025110638 - Ubuntu update for linux
Published: November 6, 2025 Updated: February 6, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Input validation error (CVE-ID: CVE-2025-40300)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the vcpu_enter_guest() function in arch/x86/kvm/x86.c. A local user can perform a denial of service (DoS) attack.
2) Race condition (CVE-ID: CVE-2025-38352)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition within the run_posix_cpu_timers() function in kernel/time/posix-cpu-timers.c. A local user can escalate privileges on the system.
Note, the vulnerability is being actively exploited in the wild against Android devices.
3) Use-after-free (CVE-ID: CVE-2025-38118)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the mgmt_adv_monitor_added(), __add_adv_patterns_monitor(), mgmt_remove_adv_monitor_complete() and remove_adv_monitor() functions in net/bluetooth/mgmt.c, within the hci_free_adv_monitor() function in net/bluetooth/hci_core.c. A local user can escalate privileges on the system.
4) Use-after-free (CVE-ID: CVE-2025-37838)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ssip_reset() function in drivers/hsi/clients/ssi_protocol.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.